Boss Audio Bolt Marine Bluetooth Portable Speaker System w/Flashlight - Pair - Black. They also play music with a USB/SD. The built-in rechargeable battery provides up to 12 hours of playback. Both speakers include a built-in emergency flashlight. IPX4 Waterproof Design. Specifications for Boss Audio Bolt Marine Bluetooth Portable Speaker System w/Flashlight: Manufacturer: Boss Audio Color: Blue Quantity: 1 Features of Boss Audio Bolt Marine Bluetooth Portable Speaker System w/Flashlight Easy access connection ports Available in multiple colors Rubberized Anti-Slip base IPX4 Stream and control your favorite muisc apps Bluetooth Connectivity with 33' range Stream music to both speakers wirelessly and simultaneously TWS - True Wireless Stereo Hands-free calling Play music with a USB/TF card Built-in rechargeable Li-ion Battery Built-in Emergency flashlight 15 hours playtime 3.5 mm Aux-in Sold in pairs Dimensions: 2.62" x Diameter: 8.25" Package Contents: Boss Audio Bolt Marine Bluetooth Portable Speaker System w/Flashlight Boss Audio BOLTBLK: Bolt Marine Bluetooth Portable Speaker System w/Flashlight - Pair - Black